Question

Sa se calculeze:
$log_{15}3+ log_{15}5$
lg60-lg6

$2^{x}=3\\2^{x}=2\\\sqrt{x+1}=3\sqrt{2x+1}=5+x$

$log_{2}(x+1)=3$

Answer 1

Răspuns

a) log₁₅3*5=log₁₅15=1

b) lg60:6=lg 10=1

c) 2ˣ=3=> x=log₂3

d) 2ˣ=2=> x=log₂2=1

e) se ridica toate relatiile la puterea a doua - dar ceva este scris gresit ???

f) x+1=2³=>x+1=8=>x=7